<template>
  <div class="shopcar-container">
    <div class="goods-list">
      <!-- 商品列表区域 -->
      <div class="mui-card" v-for="(item, i) in goodslist" :key="item.id">
        <div class="mui-card-content">
          <div class="mui-card-content-inner">
            <!-- 利用mt-switch组件中自带的change方法绑定事件 -->
            <mt-switch 
                v-model="$store.getters.getGoodsSelected[item.id]"@change="selectedChanged(item.id, $store.getters.getGoodsSelected[item.id])"></mt-switch>
            <img :src="item.thumb_path">
            <div class="info">
              <h1>{{item.title}}</h1>
              <p>
                <span class="price">￥{{item.sell_price}}</span>
                <!-- 调用getters中的getGoodsCount方法返回o对象 -->
                <numbox :initcount="$store.getters.getGoodsCount[item.id]" :goodsid="item.id"></numbox>
                <!-- 问题：如何从购物车中获取商品的数量 -->
                <!-- 1.我们可以先创建一个空对象，然后循环购物车中所有商品的数据，把当前循环这条商品的id，作为对象的属性名，count值作为对象的属性值，这样，把所有的商品循环一遍，就会得到一个对象：如：{ 88:2, 89:3, 90:4 } -->
                <a href="#" @click.prevent="remove(item.id,i)">删除</a>
              </p>
            </div>
          </div>
        </div>
      </div>
    </div>
    <!-- 结算区域 -->
    <div class="mui-card">
      <div class="mui-card-content">
        <div class="mui-card-content-inner jiesuan">
          <div class="left">
              <p>总计(不含运费)</p>
              <p>已勾选商品<span class="red"> {{$store.getters.getGoodsCountAndAmount.count}} </span>件,总价<span class="red">￥{{$store.getters.getGoodsCountAndAmount.amount}}</span></p>
          </div>
          <mt-button type="danger">去结算</mt-button>
        </div>
      </div>
    </div>

    <p>{{$store.getters.getGoodsSelected}}</p>
  </div>
</template>
<script>
import numbox from '../subcomponents/shopcar_numbox.vue'

export default {
  data() {
    return {
      goodslist: [] //购物车所有商品的数据
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    getGoodsList() {
      //获取store中所有商品的id,然后拼接出一个逗号分割的字符串
      var idArr = [];
      this.$store.state.car.forEach(item => {
        idArr.push(item.id)
      });
      //如果购物车中没有商品 则直接返回 不需要请求接口 否则报错
      if (idArr.length <= 0) {
        return;
      }
      //获取购物车商品列表
      this.$http.get('api/goods/getshopcarlist/' + idArr.join(',')).then(result => {
        if (result.body.status === 0) {
          this.goodslist = result.body.message
        }
      })
    },
    remove(id,index){
        //点击删除把商品从store中根据传递的id删除，同时 把当前组件中的goodslist中，对应要删除的那个商品 使用index来删除
        ////从数组中index的位置开始删除，删除1个
        this.goodslist.splice(index,1)
        this.$store.commit('removeFromCar',id)
    },
    selectedChanged(id,val){
        //每当点击开关，把最新的开关状态，同步到store中
        this.$store.commit('updateGoodsSelected',{
            id:id,
            selected:val
        })
    }
  },
  components: {
    numbox
  }
};

</script>
<style scoped>
.shopcar-container {
  background-color: #eee;
  overflow: hidden;
}

.goods-list img {
  width: 60px;
  height: 60px;
}

h1 {
  font-size: 13px;
}

.price {
  color: red;
  font-weight: bold;
}

.mui-card-content-inner {
  display: flex;
  align-items: center;
}

.info {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.jiesuan{
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.red{
    color: red;
    font-weight: bold;
    font-size: 16px;
}
</style>
